I've been thinking about how these technologies could be implemented and then started playing out the series of events and use-cases to make this a reality.

I am still sticking with my original hypothesis that separating the display/output device from the actual computing device could be a significant, useful and liberating disruption. Something, that I have been thinking about for 3 years or 27 years, depending on how you look at it.

Regarding, interactive walls and interactive floor panels. Here is a use case, or a series of them that I started thinking about. Actually, I had this lucid dream last night and it was super vivid:

I could see myself waking up from sleep and walking towards the washroom. The lights in the bedroom were a very dim hue of blue and purple.

The floor was illuminated in a series of these octagonal steps. So as to guide my path to the washroom and so that I do not stumble onto something and fall.

Once in the washroom. The lights were dimmed out, but the edges of most objects were highlighted. I guess this idea of illuminated edges was coming from watching Automan, back when I was a kid.

The lights in the washroom would get less dim as I continued gaining consciousness.

Once I was back in the room, the same illuminated floor led me to the another area. The lights in the bedroom were out. So as to not disturb the person sleeping on the bed.

But it wasn't just the dream itself. I was actually thinking (in that lucid dream) problems related to:

What technology could power such a construct. A newer, smaller, faster, more efficient form of computing, display tech and advanced sensors.

Authentication: How could the surroundings authenticate who the user was on a real-time basis. (No facial recognition - multiple options).

UX: What happens when user would put one foot on the floor (getting off from their bed) and then both their feet. What would happen when they started walking towards a specific direction and how their path would be illuminated. How these steps were related to step 1 and 2 above, cognizant of the fact that there is another person in the room and their state of consciousness/awareness is not the same as user A.